🚨 HSE Launches UK Inspection Campaign on Isocyanate Exposure in Vehicle Workshops

Why Biological Monitoring (Urine Testing) Is Now a Legal Must-Have for Bodyshops

The HSE has launched 1,000 inspections across UK vehicle repair workshops focusing on isocyanate exposure. Learn why biological monitoring (urine testing) and occupational health screening are essential to stay compliant – and how Prohas can help.

A nationwide HSE crackdown is underway

On 24 September 2025, the Health and Safety Executive (HSE) began a UK-wide inspection campaign targeting isocyanate exposure in vehicle paint and repair workshops. The focus? Garages and bodyshops using 2-pack paints and coatings – the leading source of occupational asthma in the automotive sector.

Inspectors will visit more than 1,000 sites to check whether employers are properly controlling exposure to these highly hazardous substances under the Control of Substances Hazardous to Health (COSHH) Regulations 2002.

Even in workshops with modern spray booths and extraction systems, isocyanates can escape into the air when controls deteriorate, filters clog, or PPE is misused. Once inhaled or absorbed through the skin, they can trigger asthma, breathing difficulties, and long-term sensitisation.

The invisible workplace risk

Isocyanates are colourless, odourless chemicals used in paints, lacquers, and clear-coats. Because you can’t see or smell them, it’s impossible to tell whether exposure is happening without proper testing.

Even brief or low-level contact can cause irreversible sensitisation. After that point, tiny future exposures – even seconds of contact – can cause severe asthma attacks and force workers to leave the trade permanently.

This is why HSE inspectors will expect clear evidence that you’re doing more than simply “ticking the box.” They’ll want to see that your controls are working in practice, not just on paper.

What HSE inspectors are checking

• Spray booth and LEV maintenance records
• Air-fed RPE for paint sprayers (filter masks are not enough)
• Clearance times for re-entry to spray booths, clearly displayed and followed
• Health surveillance records – including biological monitoring (urine sampling)

If any of these are missing or outdated, enforcement action may follow – ranging from improvement notices to prosecution for COSHH breaches.

Why biological monitoring (urine sampling) is essential

Biological monitoring is a simple urine test that detects markers of isocyanate exposure in the body. It’s the only reliable way to prove whether your existing controls are actually preventing harmful absorption.

Here’s why it matters:

1. Isocyanates are absorbed through lungs and skin. Even if staff wear masks, poor fit, leaks, or skin contact during mixing or cleaning can cause exposure.
2. You can’t rely on symptoms. Many people have no warning signs until asthma develops – by then it’s too late.
3. Urine tests reveal hidden exposure. The test measures isocyanate metabolites, confirming whether your spray booth, LEV, and PPE are truly effective.
4. It’s a legal duty under COSHH Regulation 11. Anyone spraying or cleaning equipment containing isocyanates must be under suitable health surveillance, including biological monitoring.
5. HSE inspectors are specifically asking for proof. Lack of monitoring is one of the most common non-compliances found during current inspections.

In short: biological monitoring saves careers. It identifies exposure problems early, before irreversible asthma or enforcement action occurs.

What good health surveillance looks like

• Pre-employment and annual health questionnaires (respiratory focus)
• Spirometry (lung-function) testing where appropriate
• Regular urine sampling to detect isocyanate metabolites
• Record-keeping and reporting under medical confidentiality
• Prompt follow-up if any abnormal results are found

Monitoring should be carried out by a competent occupational health provider familiar with isocyanate work. Results help demonstrate to the HSE that you are taking reasonable steps to protect staff.

The cost of getting it wrong

HSE data shows that vehicle paint sprayers are 80 times more likely to develop occupational asthma than the average worker. The cost of failing to manage exposure properly includes:

• Lost skilled staff through ill-health or career change
• Fines and enforcement notices under COSHH
• Increased insurance premiums and downtime
• Reputational damage with clients and regulators

For small workshops, one enforcement visit can be financially devastating.

How Prohas can help

At Prohas Ltd, our Auto Safety Hub programme helps you get ahead of HSE inspections by providing:

• ✅ Independent COSHH and isocyanate control reviews
• ✅ Coordination with trusted occupational health providers for urine sampling and health surveillance
• ✅ Coordination with LEV and spray booth performance-check providers
• ✅ Practical action plans to close compliance gaps quickly
• ✅ Ongoing advice through our Auto Safety Hub membership or bespoke consultancy

Our goal is simple: to keep your team safe, your business compliant, and your reputation strong.

Don’t wait for the HSE to arrive

With inspectors already on the road, now is the time to act. Review your spray booth performance, RPE, and health surveillance records today.

If you’re unsure where to start, we can arrange a one-off Isocyanate Safety Review to assess your current controls and connect you with occupational health for biological monitoring.

📞 Call 0800 170 0504 or email to book your review.
Visit www.prohas.co.uk for more information or to explore our Auto Safety Hub for garages and workshops.

Invisible doesn’t mean safe.
Isocyanates can’t be seen or smelled but HSE inspectors can. Make sure your controls, records, and health surveillance stand up to inspection.

#HealthAndSafety #VehicleRepair #Bodyshop #COSHH #Isocyanates #OccupationalHealth #HSE #WorkplaceSafety #AutoSafetyHub #Prohas #SafetyForTrades #DancingWithDisaster #DancingWithRisk